Don't depend on jemallocator on Windows

Summary: Hopefully fixes the GitHub CI.

Reviewed By: SamChou19815

Differential Revision: D73957437

fbshipit-source-id: eddf42019013c3f2ac5dbff1baef6b511e571de3

Author: ndmitchell

pyrefly/Cargo.toml

@@ -73,8 +73,10 @@ tempfile = "3.15"
 tar = "0.4.44"
 zstd = { version = "0.13", features = ["experimental", "zstdmt"] }
 
-[target.'cfg(not(target_arch = "wasm32"))'.dependencies]
+[target.'cfg(any(target_os = "linux", target_os = "macos"))'.dependencies]
 jemallocator = "0.5.4"
+
+[target.'cfg(not(target_arch = "wasm32"))'.dependencies]
 watchman_client = "0.9.0"
 which = "4.2.4"
 zstd = { version = "0.13", features = ["experimental", "zstdmt"] }